Those use to be the work horse of many government agencies at radio sites. They are big, heavy and generate heat. The internals are a whole bunch of mechanical gears and shafts. Did I mention they generate heat from the TUBES inside. Those are those glass bottles with the funny glow from inside them. They use high voltage in the range of about 300 volts or so if I remember correctly. No they won't work off the car battery.Has anyone ever played around with one of these? I just got one yesterday, and would be interested as to what people think of this.